This has not yet been independently verified, but it is something that PC gamers knew would come. Hacks are all but impossible to stop. Punkbuster seems to do a decent job (not great), but other anti-hack clients have seemed to fall behind very quickly.
In the end if someone wants to cheat, they can. Soon all those XBOX cheaters (that were caught) will be able to re-flash the firmware or get a new chip to get back online and the cycle will continue.
The self regulating, dedicated server communities (some bad and some good) cannot do anything now as before. On PC someone who can hack (it will happen) can get away completly until an update is provided.